Anyone who has followed the discussion on Github and other developments in general must have realised that the Icinga2 project especially for EL users is pretty much dead, not to mention EL in general.
As recommendation I can advice to move to Debian based linux distributions and Zabbix as monitoring suite.
That being said, the only activity on this forum lately was spam, so the spam content and the respective accounts have been deleted and the registration of new accounts set to disabled.